Stand, more particularly for rontgen apparatus



Aug. 2, 1938. E. Pol-1L STAND, MORE PARTICULARLY FOR RNTGEN APPARATUS Filed Nov. 7, 1935 C712 vez? for:

Patented Aug. 2, 1938 PATENT OFFICE STAND, MORE PARTICULARLY FOR RNT- GEN APPARATUSY Ernst Pohl, Kiel, Germany Application November 7, 1933, Serial No'. 697,057 In Germany November-7, 1932 6 Claims.

The present invention relates to an adjustable stand for certain apparatus and appliances, more particularly Rntgen apparatus, said stand being adaptable to a great variety of conditions and H easily adjustable, while oiering a substantially total balance of weight in every position. A medical apparatus mounted on the stand may as advantageously be used at a sick-bed and even at a low stretcher as at a usual operation or diagnostic 10` chair or table, the stand being thus constructed that the apparatus carried by the same may be moved down to the floor and given any desired direction of operation. At the same time the stand requires very little room, so that it may even be placed between beds which are at a little distance from each other, for instance for making Rntgen observations in every direction as from above, from below and from the side.

-The supporting arm of the stand is thus formed 2O that for example a Rntgen tube mounted at itsV free end may be moved over and across the patient in order to transradiate the same in the direction towards the physician who is placed before the bed or stretcher and holds the Rntgen screen, particularly for the observation of bone fractures.

Furthermore the easily movable stand may advantageously be used by dentists in connection with Rntgen apparatus for dental photography at the usual dentist operation chairs. The wholly erected stand is so little cumbersome that it may even have a permanent place in a small operation room.

The drawing illustrates two embodiments of the invention specially adapted for Rntgen apparatus, the stand being however also applicable for other kinds of vmedical apparatus or to other appliances of any kind with which the use of an adjustable stand is usual or advisable.

Fig. 1 is a perspective view of one constructional form of the stand supporting a Rntgen apparatus and having a curved supporting arm being in substantially horizontal position in which it extends over and across the patient with the concave side of the curvature downward.

Fig. 2 shows the same stand with the supporting arm in completely elevated position.

Fig. 3 is a perspective View of a somewhat modied stand in a third position for transradiation from below, the supporting arm being almost completely moved down and having its concave side turned upward.

Figs. 4 and 5 show details.

The stand constituted of metal tubes and being of relatively low Weight comprises a foot com- (ol. 24S- 123) posed of a U-shaped portion I and a Y-shaped portion 2 and is movable on four castors 3 mounted on the ends of the U- and Y-shanks. On the U-portion I two vertical columns 4 are mounted, the upper ends lia. of which are sharply bent toward each other and then bent in the direction of the Y-shaped foot portion. The free ends 4a form a pair of supports for two pivots 6, t xed on a bearing sleeve 5. At the outwardly projecting end of the pivot 6 a handle 28 serving 10 to displace the stand is mounted. The threaded end of the pivot 6 supports a resilient brake disc 26 and a hand nut 21 by means of which the frictional resistance against tilting movement of the sleeve 5 may be controlled as desired. The 15 sleeve 5 receives an axle l having an annular abutment I0 at one end and a reduced and threaded portion la at the other end. This reduced end supports a spring brake disc 3 and a thumb nut 9, so that also the frictional resist- 20 ance to the turning of the axle 'I may be controlled. A tubular curved supporting arm iI, at the free end of which a Rntgen tube casing I2 having a funnel 3| for the passage of the rays is supported, is joined to the axle at the side 25 of the abutment I with'a sharp sideward bend,

so that the rotation axis 'I' of the axle 'i and arm I I forms a chord of the curvature arc of the arm. The casing I2 is mounted within a sleeve i5 loosely surrounding its middle portion, so that 30 the casing may be turned about its longitudinal axis. The sleeve I3 may in turn be revolvably mounted on the end of the arm II by means of a lateral projection |311, so that the Rntgen tube is cardanically movable with respect to the 35 arm II.

The transformer i4 is placed within a cage I5 guidedvby means of rings I6 on the standards 4 and pivotally suspended by means of two curved links I1 to a ring I8 mounted and longitudinally 40 movable on the tube 5, the links being pivotally connected with the cage l5 and ring Hi at i@ and 2B. Thus the transformer is acting as a counter-weight for the arm II and the Rntgen tube. On one of the guide rings i6 a leaf fric- 45 tion spring 2I is arranged acting upon the column 4.

The U-shaped portion I of the foot permits the movement of the transformer nearly dovvn to the iioor. On the supporting arm II there is a han- 50 dle 25 permitting a more easy moving of the arm.

In the construction shown in Figs. 1 and 2 the conductors 22 are going from the terminals 23 of the transformer to the Rntgen tube separately on the outside of the arm II on which they are 55 CFI supported by suitable guide members 24. In the construction shown in Fig. 3 the conductors 22 pass through the tubular arm II, whereby they act as a iiexible shaft so that as the Rntgen tube casing I2 is turned about the axis of the projection I3a the transformer I4 revolves correspondingly about its axis. The rotation of the transformer may be facilitated by supporting it on a point in the centre of its bottom or in any other suitable way.

According to Fig. 3 the casing I2 of the Rntgen tube is rotatably mounted in a fork 29 the Shanks of which receive the conductors 22 and which are rotatably mounted in the end oi the tubular arm II by its middle portion 3B.

The form oi` the supporting arm II is such that its end portion with the Rntgen tube and casing connected thereto lies on one side and its main portion on the other side of the axis 'I' which passes through the centre of gravity of the whole unit, so that the arm with tube is balanced in every position.

In both constructions shown the curvature arc of the arm has a center angle of less than 180 so that the cross rotation axis of the Rntgen tube coinciding with the axis of the end portion of the arm and the axis I are forming an acute angle, for instance of 45 with one another.

Due to the curvature of the supporting arm 'I, to the situation of its rotation axis 'I' in the line of a chord of the curvature arc and to its ability to swing about the horizontal pivots S, 6 the apparatus supported by the stand may be used in a great variety of positions and for a correspondingly large variety of work as exemplified by Figs. l, 2 and 3 of the drawing.

For example, in the position of the arm according to Fig. l a patient lying on a bed or other support may be transradiated from above, or by positioning the stand closer to the bed the arm I I may be caused to extend across the patient and by turning the tube about its own axis the ray funnel 3I may be directed against the stand, in order to transradiate the patient transversely towards the physician placed before the bed and holding the screen. By turning the arm about 90 from the position shown in Fig. 1 about the axis 'I' a horizontal direction is given to the funnel 3l so that a transradiation of a sitting or standing patient is possible.

By swinging the arm upwards and directing the funnel 3| downwards as shown in Fig. 2 the patient maybe transradiated on the bed at a greater distance. Of course intermediate positions may be given to the arm II to position the Rntgen tube in different heights. An extreme lowered position of the arm I I is shown in Fig. 3 in which the end portion of the arm with the Rntgen tube adopts a nearly horizontal position, close above the iioor so that it may be inserted beneath a bed or stretcher in order to transradiate the patient from below. In this position of the arm II it would even be possible to transversely transradiate a patient lying on the Hoor or on a very low couch not suiciently distant from the floor for permitting the insertion of the Rntgen tube below it by simply directing the funnel 3l to the right or by turning the fork 29 about the sleeve 3U by 90" in one or the other sense to give the funnel a more or less horizontal direction.

The stand described may be used as above stated to support apparatus of other kinds for medical or other purposes for which it offers similar advantages, for instance irradiation apparatus. If in any application a transformer or other source of electric current is not necessitated, a simple counter-weight will take its place. But of course, when an apparatus comprising a source of current is employed in such case, this source may also serve as a simple counter-weight.

I claim:

1. A stand for a medical apparatus, more particularly for a Rntgen tube, comprising a base, a curved supporting arm and means for Supporting said arm on said base for pivotal movement in a substantially vertical plane and for rotation about an axis forming a chord oi the curvature arc.

2. A stand for a medical apparatus, more particularly for a Rntgen tube, comprising a base, a curved supporting arm having an extension at one end in line with a chord of the curvature arc and forming an axle, a bearing for said axle, said bearing being pivotally mounted on said base with the pivot axis crossing the axis of said axle and bearing.

3. A stand for a medical apparatus, more particularly for a Rntgen tube, comprising a base. a curved supporting arm and means for supporting said arm on said base for pivotal movement in a substantially vertical plane and for rotation about an axis forming a chord of the curvature arc, said arm being adapted to receive the medical apparatus, more particularly a Rntgen tube at its free end, said free end crossing the axis of rotation so that an apparatus supported by the arm will be in opposition to the main portion of the arm with relation to the rotation axis.

4. A stand for an electrical medical apparatus, more particularly for a Rntgen tube, comprising a base, a curved supporting arm, means for ivotally supporting said arm on said base upon a substantially horizontal axis, means for supporting said arm for rotation about an axis being in line with a chord of the curvature arc, means provided at the end of said curved arm adapted to receive an electr-ical medical apparatus, said arm comprising a rearward extension, a movable support adapted to receive a source of electrical energy, and means for suspending said support to said rearward extension.

5. A stand according to claim l, in which the curvature of the arm extends over a center angle of less than 180, so that its end forms an acute angle with the rotation axis.

6. A stand for an electrical medical apparatus, more particularly for a Rntgen tube, comprising a base, a curved supporting arm, means for supporting said arm on said base for pivotal movement in a substantially vertical plane and for rotation about an axis being in line with a chord of the curvature arc, means provided at the end of said curved arm adapted to receive an electrical medical apparatus, means adapted to receive a source of electrical energy, and current conductors carried by said supporting arm and adapted to connect said source and apparatus when these are in place on the stand.

ERNST POHL. 

